Screw-down for rolling-mills.



W. F. RUST & G. H. HUNT.

I SCREW DOWN FOR ROLLING MILLS.

APPLICATION IILfiD MAY 1, 1912.

3 SHEETS-SHEET 1.

WITNESSES IN VENTORS.

f 194M BY ,(fz wm I fimm W. F. .RUST 6 G. H. HUNT. SCREW DOWN FOR ROLLING MILLS.

APPLICATION FILED MAY 1, 1912.

Patented Sept. 30, 1913.

3 SHBETS-SHEET 2.

I N VEN T 0R8.

A TTORNE Y WITNESSES:

W. P. RUST & c. H. H NT. SCREW DOWN FOR ROLLING'MILLS.

APPLICATION FILED MAY 1, 1912.

Patented Sept. 30, 1913.

3 SHEETS-SHEET 3.

WITNESSES: I IN VEN TORS.

24,, BY Q 9 M UNITED STATES PATENT OFFICE.

WILIIAK E. BUST AND CLINTON H. HUNT, OF YOUNGSTOWN, OHIO.

SCREW-DOWN non ROLLING-MILLS.

Specification of Letters ram. Patented Sept. 30, 1913. Application-filed May 1, 1912. Serial No. 694,533.

To all whom it may concern:

and CLINTON H. HUNT, citizens of the United States, both residing at Youngstown,

6 in the county of Mahoning and State of Ohio, have invented new and useful provements in Screw-Downs for Rollmgfills, of which the following is a spec1fication? 'Our invention relates to screw-downs for rolling mills,'and its principal Ob]0t 1s to reduce as much as possible the head room over the top, of a rolling mill while using bevel gearing for driving the roll-adjusting screws, in connection with the single cylinder method of roll and spindlebalancing.

Referring to the accompanying drawings, Figure 1 is a plan of a mill embodying our invention; Fig. 2, a side elevation thereof, partly in vertical section on the line A-A, Fi 1; and Fig. 3, an end view.

n the drawings, '1 and 2 represent the housings for the rolls, the upper roll 3 being the only roll shown. As the manner of balancing the roll and driving it down is the same for each end of the roll, we haveillustrated the same in detail in connection with one end only of the roll.

The vertical hydraulic cylinder 4 is supported on the cross beam or plate 5 between the housings 1 and 2, and its vertical center lies in the plane passing through the axis of the roll 3.

6 represents the piston'which works vertically in the cylinder 4 and carries at its upper end. the horizontal cross-head 7 arranged transversely of the roll. The ends of the cross-head support vertical rods 8 which extend downwardly and have their lower ends connected to the beams 9 near their centers. These beams are parallel with the roll and have their ends guided in the vertical slots 10 in the housings, in which slots the ends of the roll are guided. The ends of the beams 9 carry the hangers or eye rods 11, connected to the beams by the pins 12. The lower ends of the hangers 11 support the lower bearings 13 ofthe roll 3 in any suitable manner. The hangers on the corresponding ends of the two beams 9 support one end of the roll, and the remaining ends of the beams support the other end of the roll.

The upper ends of the housings have suitable gear-housings, and supports for the driving mechanism for the vertical roll-a'dcause the latter to rise or descend as the screws are rotated.

17 represents gear housings on the tops of the housings 1 and 2. Each housing 17 contains the same mechanism and a descrip-- tion of such mechanism in the right-hand housing will sufiice. The screw 14 has its .upper end square and reciprocable in the azrially rotatable sleeve 18., which is provided with the peripheral bevel gear 19, meshing with the bevel gear 20 on the short horizontal shaft 21. This shaft has its inner end supported in the housing 17 and its outer end in the bearing 22, which together with its support is located sufficiently close to the 2 housing 17 as not to interfere with the vertical movements of the cross-head 7 or with access to the cylinder'4 and piston 6 for their repair or removal. The shaft 21 is parallel with the roll 3 and has its axis in the plane passing'through the vertical centers of the screws and the axis of the roll. It will be observed that'the bearing 22 and the shaft 21 for the housing 1 are at the left of this housing, which permits the location of the cylinder 4 nearer the housing 1 than the housing 2, thereby economizing space between the housings and increasing the room for the cross-head 7 which has vertical movement above and below the shafts 21.

The shafts 21 are each provided with a spur-gear 23 which meshes with a pinion 24 tion of the housings 17, the shafts 21, the

housings 22, the shaft 25, or any other part of the mill structure. The spur-gears 23 and 24 are of such size that the shaft 25 is ofli-set enough to give clearance for the cross-head or other movable parts of the roll-balancing mechanism above the cylinder 4. The shaft 25 may, by the mechanism'described, be placed below the upper limit of the cross-head, and we have shown it in its 25 zontal bevel gear shafts, each shaft provided referable position which is in the same orizontal p ane with the shafts 21.

By the present invention a clear space is left above and around the balancing-cylinder mechanism, and a lower mill-top is provided than is required when the screw-driving shaft lies vertically above the balancing cylinder. Applicants derive all the'advantages of bevel-gears and spur-gears for operating the screws and still give clearance for the action of the balancing mechanism without reducing the overhead space for repairs, and the accommodation of a crane or other apparatus.

We claim:

1. In a screw-down for rolling mills, La pair of housings, a roll between the housings and having its ends within the'housings, a vertical screw in each housing arranged to drive the roll downwardly and hold it from rising, a roll-balancing mechanism having vertically-removable elements over the roll and between the housings, a horizontal bevel-gear wheel in axial alinement with each screw for rotating the same, two horiwith a bevel-gear wheel meshing, respectively, with the horizontal bevel-gear wheels, a horizontal drive-shaft parallel with the two bevel-gear shafts, and s ur gearing connecting each bevel-gear sha t with the drive shaft, the said three shafts being clear of the space required for the vertical removal of the said roll-balancing elements.

2. In a screw-down for rolling mills, a.

pair of housings, a roll between the housings and having its ends within the housings, a vertical screw in each housing arranged to drive the roll downwardly and hold it from rising, -a roll-balancing mechanism having vertically-removable elements over the roll and between the, housings, a horizontal bevel-gear wheel in axial alinement withv each screw for rotating the same, two ;horizontal bevel ear shafts, each shaft provided.

with a beve -gear wheel meshing, respectively, with the horizontal bevel-gear wheels, a horizontal drive-shaft parallel with the two bevel-gear shafts, and spur gearing connecting each bevel-gear shaft with the drive shaft, the said three shafts being clear ofthe space required for the vertical removal of the said roll-balancing elements and oneof the bevel gear shafts being located on the side of the screw opposite the said roll-balancing mechanism. 7

Signed at Youngstown, Oh1o, this 29th day of April, 1912. 1

WILLIAM F. RUST. CLINTON H. HUNT.

Witnesses:

A. R. FOSTER, W. G. KU iLMAN. 

